Oil well pump



2 Sheeis-Shegt 1 y 1931- J. B. HAWLEY, JR

I 0 11, WELL PUMP Filed Feb. 10, 1930 v a g n 5 m 1| II w 2 Sheets-Sheet2 J. B. HAWLEY, JR

01L wnm. rump I Filed Feb/10, 19:50

July 28, 1931.

- Patented July 28, 1931 JOHIV B. HAWLEY, JR., MINNEAPOLIS, MINNESOTAOIL WELL PUMP Application-fil ed February 10, 1930. Serial No. 427,864.

This invention relates to improvements in well pumping -,units, andparticularly with deep-well pumping units wherein the unit.

motive power is derived from an electric motor in direct connection withthe pumping element, as disclosed in my prior Patent No. 1,641,329,issued Sept. 6, 1927.

In oil well pumping units, the use of a centrifugal pump involves theutilization of the entire relatively restricted space enclosed withinthe casing walls, and such structure does not permit of the passage ofthe current wires through the pump body, as shown in my patent abovereferred to. It is therefore the primary object of this invention toprovide means for simply and effectively bringing the wires from theelectric motor to the top of the pump.

Other objects of the invention will be made apparent in the followingspecification, when read in connection with the accompanying drawingsforming a part thereof.

In said drawings Fig. 1 is a longitudinal section taken through theupper portion of the pumping Fig. 2 is a similar section taken throughthe lower portion of the unit.

Fig. 3 is an enlarged sectional detail taken through the top portion ofthe casingr adjacent the exit end thereof.

ig. 4 is a section on the line 44, Fig. 1, and,

Fig. 5 is a section on the line 5-5, Fig. 1..

Now referring specifically to the drawings, in which like referencenumerals indicate like parts throughout theseveral views, 1 indicatesthe pump casing provided with an electric motor 2 at the bottom, as bestillustrated, somewhat conventionally in Fig. 2. The motor 2 isoperatively mounted on of the shaft 3 being 'hel a hollow, rotatableshaft '3 extending centrally therethrough, and positioned in the axialcenter of the casin the lower end in anti-friction bearings 4, supportedby .the head 5, suitably connected to the casing 1.

The shaft 3 extends upwardly above the motor 2 and is operativelyconnected,-

through a coupling member 6, to a pump 7,

provided with impellers or vanes 8 so posed as to draw liquid into thepump through a screened inlet 9, and to force it through an outlet 10into a conduit. 11, leading to the top of the well.

Located within the shaft 3 is a tube 12 spaced from and fixed againstrotation with said shaft. The lower end of the. tube 12 rests on a plate13, and in one side of the lower periphery of the tube is provided asuitably packed aperture permitting the entrance of the current wires 14thereinto. The wires 14 are of course operatively connected to the motorand are first extended downwardly therefrom, through the nonrotatablesection 5 of the bearing member, and into the tube 12 and up to the topthereof.

Near the top of the casing 1, as here shown, is provided a suitablymounted spider plate 16, having a conduit 17 extended through oneof itsbranches 18, and the upper end of the tube 12 is apertured inregistration with said conduit, so that it may pass throu h a side wallof the tube 12, and throng the conduit 17 for connection to a source ofower.

The top'of tlie tube 12 is provided with suitable packing material 19here illustrated as a plurality of packing washers 20,.such packingpreventing the emission, through the port in the side wall of thetube12, of

any lnsulating or lubricating oil, and a plug or cap 21 is screwed intothe top of the tube. From the foregoing it will be manifest that whenthe motor 2 is energized, the

shaft 3 is rotated to draw liquid through the port 9 and through theoutlet 10, but that the tube 12 always remains stationary, the assemblyproviding a safe and effective .shield for the wires, with no sacrificeof appended claims.

I claim 1. A cylindrical casing having a pump therein, an electric motorin-said casing below the pump and adapted to actuate the latter, anon-rotative tube concentrically mounted within the casing and extendingthrough the motor and pump, and electric wires operatively connected tosaid motor and extended upwardly through said tube.

2. A cylindrical casing having an electric motor mounted therein, a pumpabove said motor, a rotating shaft for said motor disposed axiallywithin the casing and adapted to actuate said pump, a tube fixed againstrotation and disposed axially within said shaft, and electric wiresconnected to said motor, extending into and through said tube andprojecting through lateral openings provided in each end of the tube.

3. A cylindrical casing having an electric motor mounted therein, arotatable shaft carried by the motor and extending axially of thecasing, a pump mounted above the motor and operatively connected to theshaft, a fixed tube extending longitudinally through the shaft, andelectric wires connected. to the motor, extending longitudinally throughthe tube and laterally projecting through anopening provided at each endof the latter. 7

4. A casing having an electric motor mounted in the lower portionthereof; a hollow shaft secured to and rotated by the motor, a pumppositioned above the motor and operatively connected to said shaft, afixed tube located concentrically within said shaft, and electric wiresoperativelyconnected to the motor and extendinglongitudinally throughsaid tube and out of the upper end of the casing.

In testimony whereof I hereunto afiix my signature.

- JOHN BfHAWLEY, JR.-

